Explosion-proof motor controller apparatus
First Claim
1. An explosion-proof electronic motor controller apparatus comprising:
- an explosion-proof shell comprised of heat-conductive material;
an electronic motor controller for external motor control;
means for fast heat conduction attached or immediately adjacent to and connecting said controller to said shell, said heat conduction means comprising means for direct conduction of heat form the interior to the surface of said shell, and further comprising radiative dissipation of heat at said surface; and
means for conducting electrical signals from said controller to an external motor.
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Accused Products
Abstract
The present invention is a electronic motor control apparatus designed for use in hazardous/classified environments, such as described in Article 500, Section 500.7 of the NFPA 70/National Electrical Code. The invention comprises a third party approved (i.e., UL Listed, UL Classified, CSA Certified, FM Approved, CE Approved) explosion-proof outer shell of aluminum, an interior controller, and a plurality of conductive plates to carry heat away from the interior controller to the external shell and environment. The controller may be an inverter or a solid-state device, and may be capable of variable frequency and voltage output. Interior and/or exterior cooling devices, such as fans, may be attached or adjacent to the apparatus to assist in heat dispersal. Interior air circulating booster fans may be installed inside the apparatus to increase internal air film coefficient, thus providing a maximized heat dissipative atmosphere. Exterior cooling devices rated to the area may be used to assist with maintaining the external air film coefficient and/or maximizing the thermal capabilities of the environment surrounding subject enclosure.
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Citations
30 Claims
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1. An explosion-proof electronic motor controller apparatus comprising:
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an explosion-proof shell comprised of heat-conductive material;
an electronic motor controller for external motor control;
means for fast heat conduction attached or immediately adjacent to and connecting said controller to said shell, said heat conduction means comprising means for direct conduction of heat form the interior to the surface of said shell, and further comprising radiative dissipation of heat at said surface; and
means for conducting electrical signals from said controller to an external motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 29)
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14. An explosion-proof electronic motor controller apparatus comprising:
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an explosion-proof shell comprised of heat-conductive material;
an electronic motor controller for external motor control;
means for direct conduction of heat from the interior to the surface of said shell;
external means for cooling said shell;
means for fast heat conduction attached or immediately adjacent to and connecting said controller to said shell; and
means for conducting electrical signals from said controller to an external motor. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30)
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Specification